Laminated sails combining textile reinforcement with plastic film are classified based on the essential character of the article. If the textile component provides the structural function and the film is a coating or laminate, the article typically remains in the textile sail heading. However, heavily laminated constructions where the plastic predominates may shift classification, so detailed construction data should be reviewed with a customs broker.

Custom and production sails are classified identically based on material and construction — there is no separate tariff treatment for custom-made articles. However, valuation may differ: custom sails should be declared at their actual transaction value, and any assists (e.g., buyer-furnished design specifications) must be included in the dutiable value.